Definition of "backstabber" [backstabber]

• A traitor or hypocrite, such as a co-worker or friend assumed trustworthy but who figuratively attacks when one's back is turned. (noun)

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• "Not being a backstabber is a good start, but not enough after the Straight Talk Trainwreck."
• "If the backstabber is your boss, demand you create "clarification procedures" for fixing the problem that are put on record somewhere."
• "If the backstabber is a colleague, not only confront the offender, but request a private meeting with your boss -- and show them the offending "knife evidence" in a calm, rational way."